[AOS26-05] Seismic monitoring by autonomous floats to image Earth’s interior
Keywords:float, hydrophone, seismic wave, mantle
In 2016 a group of researchers from across the globe formed a consortium, EarthScope-Oceans (ESO; see www.earthscopeoceans.org). Their mission is the high-resolution imaging of the whole mantle especially below the oceans where has because of lack of seismic data. In 2018 ESO begin its first large-scale deployment using more than 50 MERMAID instruments to study the mantle beneath the South Pacific Superswell, broad seafloor anomalously elevated and concatenated by several volcanic island (hot spot) chain. Seismological studies have commonly revealed large areas of significantly low seismic velocity in the lower mantle beneath the South Pacific, suggesting the presence of mantle upwelling that are potentially deeply rooted and possibly even fed by the underlying Pacific Large Low Shear Velocity Province. The goal of the South Pacific Plume Imaging with MERMAIDs (SPPIM) experiment is to refine tomographic images of this region. The MERMAIDs will continue to send us P wave records for the next 5 years.